Substack vs Lighthouse: Which Fits an Indie Launch? (2026)
Honest comparison of Substack and Lighthouse for indie founders. Substack if the publication IS the product. Lighthouse if the newsletter is one piece of a launch toolkit. Price, features, audience, and who should pick which.
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Substack is for writing a newsletter as a publication. Lighthouse is for launching a non-newsletter product where the newsletter is one of four pieces. The fork between the two is bigger than the marketing materials suggest. This is the honest comparison from someone who has tried both for different jobs.
I have shipped 7 indie apps over 8 years and ended up building two tools for myself along the way: Spaceport, a SwiftUI starter that gets a paid iOS app live in days, and Lighthouse, the launch toolkit this post is mostly about. Different audiences, same indie-dev frustration: every new project rebuilt the same plumbing.
Table of contents
What each tool actually is
Substack is a hosted publication platform. You write a newsletter, readers subscribe for free or paid, the platform handles billing for paid subs, and you ride the cross-newsletter discovery surface (Notes, recommendations, the Substack reader app). The newsletter is the product, and Substack takes 10 percent of paid revenue.
Lighthouse is a launch toolkit for indie founders. A waitlist with survey questions on the same form, a newsletter for the list after launch, a feedback page for once people are using your thing, and a REST API on Pro. Flat indie pricing. Built for people whose product is an app, a tool, or a SaaS, not a publication.
Side-by-side comparison
Two tools shaped for two different jobs. The matrix below is the honest version.
| Capability | Substack | Lighthouse |
|---|---|---|
| Public subscribe page for a newsletter | Yes, the default homepage | Yes, simpler |
| Waitlist with survey questions on signup | No, the signup is just an email | Yes, the main use case |
| Feedback page after launch | No | Yes, baked in |
| Paid subscriptions to the newsletter | Yes, the headline feature | No, not the lane |
| Cross-publication discovery | Yes (Notes, recommendations, reader app) | No |
| Comments and threaded discussion | Yes, on every post | No |
| REST API access | No public API | Full on Pro tier |
| Custom domain | Yes, paid add-on | Yes on Pro |
| Pricing | Free + 10 percent of paid revenue | $19 a month flat, $29 with API |
Where Substack wins
Be honest about this part. Substack is the right tool for a real list of jobs:
- Running a newsletter as a publication. Long- form weekly writing, paid tiers, paid posts, recurring revenue from readers directly. Lighthouse does not try to be this.
- Cross-publication discovery. The Substack ecosystem (Notes, recommendations, the Substack reader app) gives a new newsletter a starting audience that costs nothing to acquire. For pure newsletter operators this is real distribution.
- Threaded comments and reader community. Every post has a comment thread and many newsletters become communities through it. Useful when the newsletter is the product.
- Zero cost until paid revenue. Free to write, Substack takes 10 percent only when you charge readers. Cheap to start, expensive at scale.
Practical rule: if you are evaluating Substack because the newsletter IS the product, you already have the answer.
Where Lighthouse wins
Lighthouse is the better fit when the newsletter is one piece of launching and keeping a product alive:
- Waitlist with survey questions on the signup form. The validation insight Substack does not have a shape for. More in why answers beat emails.
- One tool for the whole launch arc. Pre-launch waitlist, launch newsletter, post-launch feedback page, all in one dashboard. Substack does not touch the waitlist or feedback sides.
- Flat indie pricing as the list grows. $19 a month does not change when you cross 10,000 subscribers. Substack's 10 percent on a $5/month paid sub becomes a real tax once revenue compounds.
- Custom domain on Pro and a REST API. If your launch flow lives inside your own app, the waitlist or newsletter parts can be wired in via code rather than via CSV import.
Who should pick which
The writer with a publication
You want to write a newsletter, get readers, charge some of them for premium content, and grow through the platform's recommendation network. Pick Substack. Lighthouse is the wrong tool for this job and Substack is the right one.
The indie launch founder
You are launching a small SaaS, an iOS app, or any indie product. You need a pre-launch waitlist with survey questions, a newsletter to email the list when you ship, and a place to collect feedback after. Pick Lighthouse. Substack does not have shapes for the waitlist or feedback sides at all.
The fundraising founder
You are raising capital and your investor updates go out in a newsletter format. Neither Substack nor Lighthouse is the headline tool here. The bottleneck is the raise itself, which is what dedicated platforms like Funding Banker, a curated investor directory with pitch and outreach tracking, are built for. For the updates, Substack works if you want them indexable; Lighthouse works if you also want the launch arc covered.
The post-launch SaaS founder
You shipped, you have customers, and you want to send the occasional update and collect feature requests. Pick Lighthouse for the bundled flow. Substack works if you specifically want the newsletter to also be a public publication, but you will end up using a separate tool for the feedback side. See best product feedback tools for the feedback half.
Moving between the two
Both tools speak in CSVs, so subscribers move cleanly. The harder parts are the things one tool stores and the other does not.
| What you move | Cleanly? | Notes |
|---|---|---|
| Free subscribers | Yes | CSV import, standard, either direction. |
| Past newsletter content | Mostly yes | Re-import as HTML or markdown. Some formatting drift between editors. |
| Paid subscribers and Stripe | Partial | Substack uses its own Stripe connection. Migrating off means recreating subscriptions in your own Stripe. |
| Survey answers attached to signups | No | Substack does not store these. Leaving Lighthouse means you lose this data. |
| Substack Notes and comments | No | These do not exist outside the Substack ecosystem. |
Frequently asked questions
Is Substack better than Lighthouse?
Wrong question. Substack is better than Lighthouse for running a publication. Lighthouse is better than Substack for launching a non-publication product. Different jobs, different tools.
Can I run a paid newsletter on Lighthouse?
Not natively. Lighthouse is built for the launch toolkit job, not for newsletter monetisation. If paid subscriptions are central to your model, Substack or Beehiiv is a better fit. See the Beehiiv vs Lighthouse comparison for the other side of that decision.
Does Substack support a pre-launch waitlist?
The signup form takes an email and that is the full extent of it. You cannot attach survey questions, which is the validation insight an indie launch needs. See how to build a waitlist for your app for what the signup form should actually ask.
How does the cost compare at scale?
Substack is free until you charge readers, then it takes 10 percent of revenue. Lighthouse is a flat $19 a month regardless of list size. For a paid newsletter at scale Substack can become expensive; for a free or low-paid list Lighthouse is the cheaper option.
Can I use Lighthouse just to send a newsletter?
Yes, but you would be using one of four features. If the newsletter is the whole job, Substack or Beehiiv is the more specialised tool. Lighthouse pays back when you also want the waitlist, survey, or feedback sides.
Pick the tool that fits the actual job. If the newsletter IS the publication, Substack. If the newsletter is one of four pieces of an indie launch, Lighthouse. Most of the disappointment with either tool comes from buying it for the job it was not built for.
Lighthouse gives you the waitlist with survey questions, the newsletter for keeping the list warm, and the feedback page for after you launch, in one place. Free trial, indie pricing. From the same indie dev behind Spaceport, a SwiftUI starter kit for shipping paid iOS apps fast.